Important - Schumacher Electric SI4 Manual Del Usuario

Always run a test to establish whether the converter will operate a particular piece of
equipment or device. In the event of a power overload, the converter is designed to
automatically shut down.
This safety feature prevents damaging the converter while testing devices and
equipment within the wattage range of the converter.
IMPORTANT: This converter uses a modified sine waveform (diagram A) which is not
quite the same as power company electricity (diagram B). For the following devices, we
strongly recommend that you use caution and check the device's manual to make sure
it is compatible with modified sine waveform.
1. Switch mode power supplies
2. Linear power supplies
3. Class 2 transformers
4. Line filter capacitors
5. Shaded pole motors
6. Fan motors
7. Microwave ovens
8. Fluorescent and high intensity lamps (with a ballast)
9. Transformer less battery chargers
Using the converter with any of these devices may cause the device to run warmer
or overheat.
Diagram A
Modified sine waveform
produced by converter
IMPORTANT: If you are using the power converter to operate a battery
charger, monitor the temperature of the battery charger for about 10
minutes. If the battery charger becomes abnormally warm, disconnect it
from the converter immediately.
NOTE: You may hear a "buzzing" sound being emitted from inexpensive sound
systems when operated with the converter. This is due to ineffective filters in the
sound system's power supply. Unfortunately, this problem can only be resolved by
purchasing a sound system with a higher quality power supply or higher quality filter.
Diagram B
Pure sine waveform
typical of home AC outlet
• •
5